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Influence of the Organic Moiety on the Tribological Properties of MoS2:Glycol Hybrid Nanoparticles-Based Dispersions

Authors
  • García, I.1
  • Galipaud, J.2
  • Kosta, I.1
  • Grande, H.1
  • Garcia-Lecina, E.1
  • Dassenoy, F.2
  • 1 CIDETEC, Basque Research and Technology Alliance (BRTA), P° Miramón, 196, Donostia-San Sebastián, 20014, Spain , Donostia-San Sebastián (Spain)
  • 2 Ecole Centrale de Lyon, LTDS. 36, Avenue Guy de Collongue, Ecully Cedex, 69134, France , Ecully Cedex (France)
Type
Published Article
Journal
Tribology Letters
Publisher
Springer US
Publication Date
Sep 25, 2020
Volume
68
Issue
4
Identifiers
DOI: 10.1007/s11249-020-01345-2
Source
Springer Nature
Keywords
License
Yellow

Abstract

MoS2:glycol hybrid nanoparticles were synthetized through a polyol route. Their tribological properties when used as lubricant additives in a PAO 6 base oil were investigated using a pin-on-disk tribometer. An important friction reduction and good anti-wear performances were observed compared to the base oil and to the no modified particles. The MoS2:glycol nanoparticles were characterized by thermogravimetric analysis, transmission electron microscopy, RAMAN spectroscopy, X-ray diffraction, and Fourier transform infrared. Furthermore, the stability of the dispersion was followed by dynamic light scattering. On the other hand, Field Emission Scanning Electron Microscopy, Energy-Dispersive X-ray Spectroscopy, and X-ray Photoelectron Spectrometry analysis showed that the tribofilm formed on the wear surfaces during the friction test is at the origin of the excellent tribological performance of the MoS2 nanoparticles. In particular, it was demonstrated that the interaction of MoS2 with the organic moiety of the nanoparticles plays a key role in the friction reduction and the good anti-wear properties of the dispersions.

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